fix yet more broken markdown links

Fixed a link problem in `thanks-for-help.md`.

Exclude tmp from the tmp/md-*.sh tools.

tmp/md-link-paths.sh

@@ -326,7 +326,7 @@ fi
 # We do not process markdown.md because it contains examples
 # of poor markdown use.
 #
-find . -name '*.md' ! -name markdown.md -print |
+find . -name '*.md' ! -name markdown.md ! -path './tmp/*' -print |
     LANG=C sort -d |
     xargs grep '\]([^)][^)]*)' /dev/null |
     sed -E \

tmp/md-links.sh

@@ -298,7 +298,7 @@ fi
 # We do not process markdown.md because it contains examples
 # of poor markdown use.
 #
-find . -name '*.md' ! -name markdown.md -print |
+find . -name '*.md' ! -name markdown.md ! -path './tmp/*' -print |
     LANG=C sort -d |
     xargs grep '\]([^)][^)]*)' /dev/null |
     sed -E \

tmp/md-local-links.sh

@@ -309,7 +309,7 @@ fi
 # We do not process markdown.md because it contains examples
 # of poor markdown use.
 #
-find . -name '*.md' ! -name markdown.md -print |
+find . -name '*.md' ! -name markdown.md ! -path './tmp/*' -print |
     LANG=C sort -d |
     xargs grep '\]([^)][^)]*)' /dev/null |
     sed -E \

tmp/md-token-links.sh

@@ -298,7 +298,7 @@ fi
 # We do not process markdown.md because it contains examples
 # of poor markdown use.
 #
-find . -name '*.md' ! -name markdown.md -print |
+find . -name '*.md' ! -name markdown.md ! -path './tmp/*' -print |
     LANG=C sort -d |
     xargs grep '\](%%[A-Za-z][0-9A-Za-z_]*%%[^)]*)' /dev/null |
     sed -E \