Fix date display bug (#24047)

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#23988 (review)

Many template helper functions are not good enough and cause various
problems, that's why I am cleaning them.

## Before


![image](https://user-images.githubusercontent.com/51889757/230930898-0c48150f-de85-461d-9455-efcfdc36b644.png)


![image](https://user-images.githubusercontent.com/2114189/231111676-b0da1392-5e47-4f89-a81e-85156aca5cfd.png)


## After


![image](https://user-images.githubusercontent.com/2114189/231111732-920f304d-dd44-4c54-9f5f-518e325006fc.png)

Author: wxiaoguang

templates/projects/list.tmpl

@@ -42,7 +42,7 @@
 					<div class="meta">
 						{{$closedDate:= TimeSinceUnix .ClosedDateUnix $.locale}}
 						{{if .IsClosed}}
-							{{svg "octicon-clock"}} {{$.locale.Tr "repo.milestones.closed" $closedDate|Str2html}}
+							{{svg "octicon-clock"}} {{$.locale.Tr "repo.milestones.closed" $closedDate | Safe}}
 						{{end}}
 						<span class="issue-stats">
 							{{svg "octicon-issue-opened" 16 "gt-mr-3"}}

templates/repo/issue/milestone_issues.tmpl

@@ -31,7 +31,7 @@
 			<div class="column">
 				{{$closedDate:= TimeSinceUnix .Milestone.ClosedDateUnix $.locale}}
 				{{if .IsClosed}}
-					{{svg "octicon-clock"}} {{$.locale.Tr "repo.milestones.closed" $closedDate|Str2html}}
+					{{svg "octicon-clock"}} {{$.locale.Tr "repo.milestones.closed" $closedDate | Safe}}
 				{{else}}
 					{{svg "octicon-calendar"}}
 					{{if .Milestone.DeadlineString}}

templates/repo/issue/milestones.tmpl

@@ -73,7 +73,7 @@
 					<div class="meta">
 						{{$closedDate:= TimeSinceUnix .ClosedDateUnix $.locale}}
 						{{if .IsClosed}}
-							{{svg "octicon-clock"}} {{$.locale.Tr "repo.milestones.closed" $closedDate|Str2html}}
+							{{svg "octicon-clock"}} {{$.locale.Tr "repo.milestones.closed" $closedDate | Safe}}
 						{{else}}
 							{{svg "octicon-calendar"}}
 							{{if .DeadlineString}}

templates/repo/issue/view_content/comments.tmpl

@@ -125,9 +125,9 @@
 					{{template "shared/user/authorlink" .Poster}}
 					{{$link := printf "%s/commit/%s" $.Repository.Link ($.Issue.PullRequest.MergedCommitID|PathEscape)}}
 					{{if eq $.Issue.PullRequest.Status 3}}
-						{{$.locale.Tr "repo.issues.manually_pull_merged_at" ($link|Escape) (ShortSha $.Issue.PullRequest.MergedCommitID) ($.BaseTarget|Escape) $createdStr | Str2html}}
+						{{$.locale.Tr "repo.issues.manually_pull_merged_at" ($link|Escape) (ShortSha $.Issue.PullRequest.MergedCommitID) ($.BaseTarget|Escape) $createdStr | Safe}}
 					{{else}}
-						{{$.locale.Tr "repo.issues.pull_merged_at" ($link|Escape) (ShortSha $.Issue.PullRequest.MergedCommitID) ($.BaseTarget|Escape) $createdStr | Str2html}}
+						{{$.locale.Tr "repo.issues.pull_merged_at" ($link|Escape) (ShortSha $.Issue.PullRequest.MergedCommitID) ($.BaseTarget|Escape) $createdStr | Safe}}
 					{{end}}
 				</span>
 			</div>

templates/repo/projects/list.tmpl

@@ -44,7 +44,7 @@
 					<div class="meta">
 						{{$closedDate:= TimeSinceUnix .ClosedDateUnix $.locale}}
 						{{if .IsClosed}}
-							{{svg "octicon-clock"}} {{$.locale.Tr "repo.milestones.closed" $closedDate|Str2html}}
+							{{svg "octicon-clock"}} {{$.locale.Tr "repo.milestones.closed" $closedDate | Safe}}
 						{{end}}
 						<span class="issue-stats">
 							{{svg "octicon-issue-opened" 16 "gt-mr-3"}}

templates/user/dashboard/milestones.tmpl

@@ -93,7 +93,7 @@
 							<div class="meta">
 								{{$closedDate:= TimeSinceUnix .ClosedDateUnix $.locale}}
 								{{if .IsClosed}}
-									{{svg "octicon-clock"}} {{$.locale.Tr "repo.milestones.closed" $closedDate|Str2html}}
+									{{svg "octicon-clock"}} {{$.locale.Tr "repo.milestones.closed" $closedDate | Safe}}
 								{{else}}
 									{{svg "octicon-calendar"}}
 									{{if .DeadlineString}}