Add syntax highlighting to SC2045

SC2045.md

@@ -2,18 +2,22 @@
 
 ### Problematic code:
 
-    for f in $(ls *.wav)
-    do
-      echo "$f"
-    done
+```sh
+for f in $(ls *.wav)
+do
+  echo "$f"
+done
+```
 
 ### Correct code:
 
-    for f in *.wav
-    do
-      [[ -e "$f" ]] || break  # handle the case of no *.wav files
-      echo "$f"
-    done
+```sh
+for f in *.wav
+do
+  [[ -e "$f" ]] || break  # handle the case of no *.wav files
+  echo "$f"
+done
+```
 
 Also note that in Bash, `shopt -s nullglob` will allow the loop to run 0 times instead of 1 if there are no matches. There are also [several other conditions](http://mywiki.wooledge.org/BashPitfalls#for_i_in_.24.28ls_.2A.mp3.29) to be aware of.
 
@@ -23,10 +27,12 @@ When looping over a set of files, it's always better to use globs when possible.
 
 The following files can or will break the first loop:
 
-    touch 'filename with spaces.wav'
-    touch 'filename with * globs.wav'
-    touch 'More_Globs[2003].wav'
-    touch 'files_with_fønny_chæracters_in_certain_locales.wav'
+```sh
+touch 'filename with spaces.wav'
+touch 'filename with * globs.wav'
+touch 'More_Globs[2003].wav'
+touch 'files_with_fønny_chæracters_in_certain_locales.wav'
+```
 
 ### Related resources: