Changes

diff --git a/skills/job-cover-letter/SKILL.md b/skills/job-cover-letter/SKILL.md
index 5cf804e..6d99f3e 100755
--- a/skills/job-cover-letter/SKILL.md
+++ b/skills/job-cover-letter/SKILL.md
@@ -140,3 +140,5 @@ Keep iterations focused — change one dimension at a time.
   real story always beats an adjective.
 - **No templates, no boilerplate.** Each cover letter is written for
   one specific job.
+- If the cover letter is to be written in LaTeX, use the “charter”
+  font.
diff --git a/skills/job-cover-letter/references/best-practices.md b/skills/job-cover-letter/references/best-practices.md
index 1f8f2de..f202d30 100755
--- a/skills/job-cover-letter/references/best-practices.md
+++ b/skills/job-cover-letter/references/best-practices.md
@@ -189,6 +189,9 @@ Hiring managers see these constantly. Cut them.
 Also avoid generic buzzwords. Avoid using em-dashes unless absolutely
 necessary.
 
+Do not use abbreviations with apostrophe, such as “I’m”, “it’s”. Use
+the full form “I am”, “it is”, etc.
+
 If a phrase shows up in 80% of cover letters, it's invisible. Replace
 it with something specific.