remove repetitive words (#29695)

Signed-off-by: pengqiseven <912170095@qq.com>

docs/content/administration/mail-templates.en-us.md

 
 If the template fails to render, it will be noticed only at the moment the mail is sent.
 A default subject is used if the subject template fails, and whatever was rendered successfully
-from the the _mail body_ is used, disregarding the rest.
+from the _mail body_ is used, disregarding the rest.
 
 Please check [Gitea's logs](administration/logging-config.md) for error messages in case of trouble.
 

models/issues/issue_search.go

 
 func applyReviewedCondition(sess *xorm.Session, reviewedID int64) *xorm.Session {
 	// Query for pull requests where you are a reviewer or commenter, excluding
-	// any pull requests already returned by the the review requested filter.
+	// any pull requests already returned by the review requested filter.
 	notPoster := builder.Neq{"issue.poster_id": reviewedID}
 	reviewed := builder.In("issue.id", builder.
 		Select("issue_id").

models/user/user.go

 	return u.Name
 }
 
-// GetCompleteName returns the the full name and username in the form of
+// GetCompleteName returns the full name and username in the form of
 // "Full Name (username)" if full name is not empty, otherwise it returns
 // "username".
 func (u *User) GetCompleteName() string {

modules/git/commit.go

 	return c.repo.GetFilesChangedBetween(pastCommit, c.ID.String())
 }
 
-// FileChangedSinceCommit Returns true if the file given has changed since the the past commit
+// FileChangedSinceCommit Returns true if the file given has changed since the past commit
 // YOU MUST ENSURE THAT pastCommit is a valid commit ID.
 func (c *Commit) FileChangedSinceCommit(filename, pastCommit string) (bool, error) {
 	return c.repo.FileChangedBetweenCommits(filename, pastCommit, c.ID.String())

routers/api/v1/repo/issue.go

 	//   required: false
 	// - name: created_by
 	//   in: query
-	//   description: Only show items which were created by the the given user
+	//   description: Only show items which were created by the given user
 	//   type: string
 	// - name: assigned_by
 	//   in: query

routers/api/v1/repo/pull_review.go

 		return nil, nil, true
 	}
 
-	// validate the the review is for the given PR
+	// validate the review is for the given PR
 	if review.IssueID != pr.IssueID {
 		ctx.NotFound("ReviewNotInPR")
 		return nil, nil, true

templates/swagger/v1_json.tmpl

           },
           {
             "type": "string",
-            "description": "Only show items which were created by the the given user",
+            "description": "Only show items which were created by the given user",
             "name": "created_by",
             "in": "query"
           },