tidy-up: miscellaneous

- drop more uses of the word "just". (not enforced here)
- drop some uses of the "will" word.
- "then" -> "than".
- tests/http/testenv/curl.py: fix copy-paste typo in error message.
- pytest: replace `shutdownh` with `shutdown` in test names.
  Spotted by GitHub Code Quality.
- comment typos.
- whitespace and newlines fixes.

Closes #21830

scripts/cd2nroff

@@ -426,7 +426,7 @@ sub single {
             print STDERR "$f:$line:1:ERROR: un-escaped < or > used\n";
             $errors++;
         }
-        # convert backslash-'<' or '> to just the second character
+        # convert backslash-'<' or '> to the second character
         $d =~ s/\\([<>])/$1/g;
 
         # mentions of curl symbols with man pages use italics by default

scripts/checksrc.pl

@@ -879,7 +879,7 @@ sub scanfile {
             }
         }
 
-        # check for "return" with parentheses around just a value/name
+        # check for "return" with parentheses around a value/name
         if($l =~ /^(.*\W)return \(\w*\);/) {
             checkwarn("RETURNPAREN", $line, length($1)+7, $file, $l,
                       "return with paren");

scripts/managen

@@ -494,7 +494,7 @@ sub render {
             }
         }
 
-        # convert backslash-'<' or '> to just the second character
+        # convert backslash-'<' or '> to the second character
         $d =~ s/\\([><])/$1/g;
         # convert single backslash to double-backslash
         $d =~ s/\\/\\\\/g if($manpage);
@@ -916,7 +916,7 @@ sub single {
             push @ex, "[0q]Example$s:\n";
             #
             # long ASCII examples are wrapped. Preferably at the last space
-            # before the margin. Or at a colon. Otherwise it just cuts at the
+            # before the margin. Or at a colon. Otherwise it cuts at the
             # exact boundary.
             #
             foreach my $e (@examples) {

scripts/mdlinkcheck

@@ -108,7 +108,7 @@ sub storelink {
             #print "-- whitelisted: $link\n";
             $whitelist{$link}++;
         }
-        # example.com is just example
+        # example.com is used as example
         elsif($link =~ /^https:\/\/(.*)example.(com|org|net)/) {
             #print "-- example: $link\n";
         }

scripts/mk-ca-bundle.pl

@@ -421,7 +421,7 @@ print CRT <<EOT;
 ## It contains the certificates in ${format}PEM format and therefore
 ## can be directly used with curl / libcurl / php_curl, or with
 ## an Apache+mod_ssl webserver for SSL client authentication.
-## Just configure this file as the SSLCACertificateFile.
+## Configure this file as the SSLCACertificateFile.
 ##
 ## Conversion done with mk-ca-bundle.pl version $version.
 ## SHA256: $newhash
@@ -493,7 +493,7 @@ while(<TXT>) {
     #
     # The latter is for certificates that have already been removed and are not
     # included. Not all explicitly distrusted certificates are ignored at this
-    # point, just those without an actual certificate.
+    # point, only those without an actual certificate.
     elsif(!$main_block && !$trust_block) {
         next;
     }

scripts/nroff2cd

@@ -30,7 +30,7 @@ This script converts an nroff file to curldown
 Example: cd2nroff [options] <file.md> > <file.3>
 
 Note: when converting .nf sections, this tool does not know if the
-section is code or just regular quotes. It then assumes and uses ~~~c
+section is code or regular quotes. It then assumes and uses ~~~c
 for code.
 
 =end comment
@@ -116,7 +116,7 @@ HEAD
             # if there are enclosing quotes, remove them first
             $word =~ s/[\"\'](.*)[\"\']\z/$1/;
             if($word eq "SEE ALSO") {
-                # we just slurp up this section
+                # we slurp up this section
                 next;
             }
             push @desc, "\n# $word\n\n";
@@ -131,7 +131,7 @@ HEAD
             push @desc, "\n## $word\n\n";
         }
         elsif($d =~ /^\.IP/) {
-            # .IP with no text we just skip
+            # .IP with no text we skip
         }
         elsif($d =~ /^\.BR (.*)/) {
             # only used for SEE ALSO

scripts/wcurl

@@ -67,7 +67,7 @@ Options:
   --no-decode-filename: Do not percent-decode the output filename, even if the percent-encoding in
                         the URL was done by wcurl, e.g.: The URL contained whitespace.
 
-  --dry-run: Do not actually execute curl, just print what would be invoked.
+  --dry-run: Do not actually execute curl, only print what would be invoked.
 
   -V, --version: Print version information.
 
@@ -197,7 +197,7 @@ get_url_filename()
         # sed to also replace ':' with the percent_encoded %3A
         */*) percent_decode "$(printf %s "${hostname_and_path}" | sed -e 's,^.*/,,' -e 's,:,%3A,g')" ;;
     esac
-    # No slash means there was just a hostname and no path; return empty string.
+    # No slash means there was only a hostname and no path; return empty string.
 }
 
 # Execute curl with the list of URLs provided by the user.