Update English translations

Just some phrasing changes to make the English translations sound more natural.

conf/locale/locale_en-US.ini

@@ -18,7 +18,7 @@ user_profile_and_more = User profile and more
 signed_in_as = Signed in as
 
 username = Username
-email = E-mail
+email = Email
 password = Password
 re_type = Re-Type
 captcha = Captcha
@@ -84,14 +84,14 @@ ssh_port_helper = Port number which your SSH server is using, leave it empty to
 http_port = HTTP Port
 http_port_helper = Port number which application will listen on.
 app_url = Application URL
-app_url_helper = This affects HTTP/HTTPS clone URL and somewhere in e-mail.
+app_url_helper = This affects HTTP/HTTPS clone URL and somewhere in email.
 
 optional_title = Optional Settings
-email_title = E-mail Service Settings
+email_title = Email Service Settings
 smtp_host = SMTP Host
 smtp_from = From
 smtp_from_helper = Mail from address, RFC 5322. It can be just an email address, or the "Name" <email@example.com> format.
-mailer_user = Sender E-mail
+mailer_user = Sender Email
 mailer_password = Sender Password
 register_confirm = Enable Register Confirmation
 mail_notify = Enable Mail Notification
@@ -111,7 +111,7 @@ admin_title = Admin Account Settings
 admin_name = Username
 admin_password = Password
 confirm_password = Confirm Password
-admin_email = Admin E-mail
+admin_email = Admin Email
 install_gogs = Install Gogs
 test_git_failed = Fail to test 'git' command: %v
 sqlite3_not_available = Your release version does not support SQLite3, please download the official binary version from %s, NOT the gobuild version.
@@ -123,7 +123,7 @@ invalid_admin_setting = Admin account setting is invalid: %v
 install_success = Welcome! We're glad that you chose Gogs, have fun and take care.
 
 [home]
-uname_holder = Username or E-mail
+uname_holder = Username or email
 password_holder = Password
 switch_dashboard_context = Switch Dashboard Context
 my_repos = My Repositories
@@ -147,13 +147,13 @@ remember_me = Remember Me
 forgot_password= Forgot Password
 forget_password = Forgot password?
 sign_up_now = Need an account? Sign up now.
-confirmation_mail_sent_prompt = A new confirmation e-mail has been sent to <b>%s</b>, please check your inbox within the next %d hours to complete the registration process.
+confirmation_mail_sent_prompt = A new confirmation email has been sent to <b>%s</b>, please check your inbox within the next %d hours to complete the registration process.
 active_your_account = Activate Your Account
 resent_limit_prompt = Sorry, you already requested an activation email recently. Please wait 3 minutes then try again.
-has_unconfirmed_mail = Hi %s, you have an unconfirmed e-mail address (<b>%s</b>). If you haven't received a confirmation e-mail or need to resend a new one, please click on the button below.
+has_unconfirmed_mail = Hi %s, you have an unconfirmed email address (<b>%s</b>). If you haven't received a confirmation email or need to resend a new one, please click on the button below.
-resend_mail = Click here to resend your activation e-mail
+resend_mail = Click here to resend your activation email
-email_not_associate = This e-mail address is not associated with any account.
+email_not_associate = This email address is not associated with any account.
-send_reset_mail = Click here to (re)send your password reset e-mail
+send_reset_mail = Click here to (re)send your password reset email
 reset_password = Reset Your Password
 invalid_code = Sorry, your confirmation code has expired or not valid.
 reset_password_helper = Click here to reset your password
@@ -161,9 +161,9 @@ password_too_short = Password length cannot be less then 6.
 
 [mail]
 activate_account = Please activate your account
-activate_email = Verify your e-mail address
+activate_email = Verify your email address
 reset_password = Reset your password
-register_success = Register success, Welcome
+register_success = Registration successful, welcome
 register_notify = Welcome on board
 
 [modal]
@@ -174,7 +174,7 @@ modify = Modify
 [form]
 UserName = Username
 RepoName = Repository name
-Email = E-mail address
+Email = Email address
 Password = Password
 Retype = Re-type password
 SSHTitle = SSH key name
@@ -182,7 +182,7 @@ HttpsUrl = HTTPS URL
 PayloadUrl = Payload URL
 TeamName = Team name
 AuthName = Authorization name
-AdminEmail = Admin E-mail
+AdminEmail = Admin email
 
 require_error = ` cannot be empty.`
 alpha_dash_error = ` must be valid alpha or numeric or dash(-_) characters.`
@@ -190,18 +190,18 @@ alpha_dash_dot_error = ` must be valid alpha or numeric or dash(-_) or dot chara
 size_error  = ` must be size %s.`
 min_size_error = ` must contain at least %s characters.`
 max_size_error = ` must contain at most %s characters.`
-email_error = ` is not a valid e-mail address.`
+email_error = ` is not a valid email address.`
 url_error = ` is not a valid URL.`
 include_error = ` must contain substring '%s'.`
 unknown_error = Unknown error:
 captcha_incorrect = Captcha didn't match.
 password_not_match = Password and confirm password are not same.
 
-username_been_taken = Username has been already taken.
+username_been_taken = Username has already been taken.
-repo_name_been_taken = Repository name has been already taken.
+repo_name_been_taken = Repository name has already been taken.
-org_name_been_taken = Organization name has been already taken.
+org_name_been_taken = Organization name has already been taken.
-team_name_been_taken = Team name has been already taken.
+team_name_been_taken = Team name has already been taken.
-email_been_used = E-mail address has been already used.
+email_been_used = Email address has already been used.
 illegal_team_name = Team name contains illegal characters.
 username_password_incorrect = Username or password is not correct.
 enterred_invalid_repo_name = Please make sure that the repository name you entered is correct.
@@ -218,7 +218,7 @@ still_own_repo = Your account still has ownership over at least one repository,
 still_has_org = Your account still has membership in at least one organization, you have to leave or delete your memberships first.
 org_still_own_repo = This organization still have ownership of repository, you have to delete or transfer them first.
 
-still_own_user = This authentication still is in use by at least one user, please remove them from the authentication and try again.
+still_own_user = This authentication is still in use by at least one user, please remove them from the authentication and try again.
 
 target_branch_not_exist = Target branch does not exist.
 
@@ -246,7 +246,7 @@ delete = Delete Account
 uid = Uid
 
 public_profile = Public Profile
-profile_desc = Your E-mail address is public and will be used for any account related notifications, and any web based operations made via the site.
+profile_desc = Your email address is public and will be used for any account related notifications, and any web based operations made via the site.
 full_name = Full Name
 website = Website
 location = Location
@@ -272,19 +272,19 @@ retype_new_password = Retype New Password
 password_incorrect = Current password is not correct.
 change_password_success = Your password was successfully changed. You can now sign using this new password.
 
-emails = E-mail Addresses
+emails = Email Addresses
-manage_emails = Manage e-mail addresses
+manage_emails = Manage email addresses
-email_desc = Your primary e-mail address will be used for notifications and other operations.
+email_desc = Your primary email address will be used for notifications and other operations.
 primary = Primary
 primary_email = Set as primary
 delete_email = Delete
-email_deletion = E-mail Deletion
+email_deletion = Email Deletion
-email_deletion_desc = Delete this e-mail address will remove related information from your account. Do you want to continue?
+email_deletion_desc = Deleting this email address will remove related information from your account. Do you want to continue?
-email_deletion_success = E-mail has been deleted successfully!
+email_deletion_success = Email has been deleted successfully!
-add_new_email = Add new e-mail address
+add_new_email = Add new email address
-add_email = Add e-mail
+add_email = Add email
-add_email_confirmation_sent = A new confirmation e-mail has been sent to '%s', please check your inbox within the next %d hours to complete the confirmation process.
+add_email_confirmation_sent = A new confirmation email has been sent to '%s', please check your inbox within the next %d hours to complete the confirmation process.
-add_email_success = Your new E-mail address was successfully added.
+add_email_success = Your new email address was successfully added.
 
 manage_ssh_keys = Manage SSH Keys
 add_key = Add Key
@@ -370,7 +370,7 @@ migrate.invalid_local_path = Invalid local path, it does not exist or not a dire
 migrate.failed = Migration failed: %v
 
 forked_from = forked from
-fork_from_self = You cannot fork repository you already owned!
+fork_from_self = You cannot fork a repository you already own!
 copy_link = Copy
 copy_link_success = Copied!
 copy_link_error = Press ⌘-C or Ctrl-C to copy
@@ -482,7 +482,7 @@ issues.label_edit = Edit
 issues.label_delete = Delete
 issues.label_modify = Label Modification
 issues.label_deletion = Label Deletion
-issues.label_deletion_desc = Delete this label will remove its information in all related issues. Do you want to continue?
+issues.label_deletion_desc = Deleting this label will remove its information in all related issues. Do you want to continue?
 issues.label_deletion_success = Label has been deleted successfully!
 
 pulls.new = New Pull Request
@@ -527,12 +527,12 @@ milestones.clear = Clear
 milestones.invalid_due_date_format = Due date format is invalid, must be 'yyyy-mm-dd'.
 milestones.create_success = Milestone '%s' has been created successfully!
 milestones.edit = Edit Milestone
-milestones.edit_subheader = Use better description for milestones so people won't be confused.
+milestones.edit_subheader = Use a better description for milestones so people won't be confused.
 milestones.cancel = Cancel
 milestones.modify = Modify Milestone
 milestones.edit_success = Changes of milestone '%s' has been saved successfully!
 milestones.deletion = Milestone Deletion
-milestones.deletion_desc = Delete this milestone will remove its information in all related issues. Do you want to continue?
+milestones.deletion_desc = Deleting this milestone will remove its information in all related issues. Do you want to continue?
 milestones.deletion_success = Milestone has been deleted successfully!
 
 wiki = Wiki
@@ -633,10 +633,10 @@ settings.no_deploy_keys = You haven't added any deploy key.
 settings.title = Title
 settings.deploy_key_content = Content
 settings.key_been_used = Deploy key content has been used.
-settings.key_name_used = Deploy key with same name has already existed.
+settings.key_name_used = Deploy key with the same name already exists.
 settings.add_key_success = New deploy key '%s' has been added successfully!
 settings.deploy_key_deletion = Delete Deploy Key
-settings.deploy_key_deletion_desc = Delete this deploy key will remove all related accesses for this repository. Do you want to continue?
+settings.deploy_key_deletion_desc = Deleting this deploy key will remove all related accesses for this repository. Do you want to continue?
 settings.deploy_key_deletion_success = Deploy key has been deleted successfully!
 
 diff.browse_source = Browse Source
@@ -667,16 +667,16 @@ release.write = Write
 release.preview = Preview
 release.loading = Loading...
 release.prerelease_desc = This is a pre-release
-release.prerelease_helper = We’ll point out that this release is not production-ready.
+release.prerelease_helper = We'll point out that this release is not production-ready.
 release.cancel = Cancel
 release.publish = Publish Release
 release.save_draft = Save Draft
 release.edit_release = Edit Release
 release.delete_release = Delete This Release
 release.deletion = Release Deletion
-release.deletion_desc = Delete this release will delete corresponding Git tag. Do you want to continue?
+release.deletion_desc = Deleting this release will delete the corresponding Git tag. Do you want to continue?
 release.deletion_success = Release has been deleted successfully!
-release.tag_name_already_exist = Release with this tag name has already existed.
+release.tag_name_already_exist = Release with this tag name already exists.
 release.downloads = Downloads
 
 [org]
@@ -882,7 +882,7 @@ auths.attribute_username = Username attribute
 auths.attribute_username_placeholder = Leave empty to use sign-in form field value for user name.
 auths.attribute_name = First name attribute
 auths.attribute_surname = Surname attribute
-auths.attribute_mail = E-mail attribute
+auths.attribute_mail = Email attribute
 auths.filter = User Filter
 auths.admin_filter = Admin Filter
 auths.ms_ad_sa = Ms Ad SA
@@ -930,7 +930,7 @@ config.db_ssl_mode_helper = (for "postgres" only)
 config.db_path = Path
 config.db_path_helper = (for "sqlite3" and "tidb")
 config.service_config = Service Configuration
-config.register_email_confirm = Require E-mail Confirmation
+config.register_email_confirm = Require email confirmation
 config.disable_register = Disable Registration
 config.show_registration_button = Show Register Button
 config.require_sign_in_view = Require Sign In View