Version number follows PEP440 : replace - by +

Close #2111

searx/version.py

@@ -59,7 +59,7 @@ def get_git_url_and_branch():
 
 
 def get_git_version():
-    git_commit_date_hash = subprocess_run(r"git show -s --date='format:%Y.%m.%d' --format='%cd-%h'")
+    git_commit_date_hash = subprocess_run(r"git show -s --date='format:%Y.%m.%d' --format='%cd+%h'")
     tag_version = git_version = git_commit_date_hash
 
     # add "-dirty" suffix if there are uncommited changes except searx/settings.yml
@@ -67,7 +67,7 @@ def get_git_version():
         subprocess_run("git diff --quiet -- . ':!searx/settings.yml' ':!utils/brand.env'")
     except subprocess.CalledProcessError as e:
         if e.returncode == 1:
-            git_version += "-dirty"
+            git_version += "+dirty"
         else:
             logger.warning('"%s" returns an unexpected return code %i', e.returncode, e.cmd)
     return git_version, tag_version