diff --git a/documentation/new-notes/PR-587 b/documentation/new-notes/PR-587.md
similarity index 100%
rename from documentation/new-notes/PR-587
rename to documentation/new-notes/PR-587.md
diff --git a/documentation/new-notes/PR-644.md b/documentation/new-notes/PR-644.md
index 2603d32ce..d30bb2018 100644
--- a/documentation/new-notes/PR-644.md
+++ b/documentation/new-notes/PR-644.md
@@ -17,7 +17,10 @@ The value of the `IOCSH_PS1` environment paremeter in those files can use the
 appearance of the prompt. The C string literal concatenation syntax can be
 used to construct the prompt string:
 
-    IOCSH_PS1 = ANSI_ESC_RED "e" ANSI_ESC_YELLOW "p" ANSI_ESC_GREEN "i" ANSI_ESC_CYAN "c" ANSI_BLUE("s") "> "
+```Makefile
+    IOCSH_PS1 = ANSI_ESC_RED "e" ANSI_ESC_YELLOW "p" ANSI_ESC_GREEN "i" \
+        ANSI_ESC_CYAN "c" ANSI_BLUE("s") "> "
+```
 
 - More error messages printed by IOC Shell commands now appear in red, or use
 the red `ERROR` prefix that was introduced in previous releases.