Only delete lines containing separator when preceded by a letter to reduce false positiv (deleting valid comments)

Signed-off-by: Christian König <ckoenig@posteo.de>

gravity.sh

@@ -770,7 +770,7 @@ gravity_ParseFileIntoDomains() {
   # 2) Remove carriage returns
   # 3) Remove lines starting with ! (ABP Comments)
   # 4) Remove lines starting with [ (ABP Header)
-  # 5) Remove lines containing ABP extended CSS selectors ("##", "#!#", "#@#", "#?#")
+  # 5) Remove lines containing ABP extended CSS selectors ("##", "#!#", "#@#", "#?#") preceded by a letter
   # 6) Remove comments (text starting with "#", include possible spaces before the hash sign)
   # 7) Remove leading tabs, spaces, etc. (Also removes leading IP addresses)
   # 8) Remove empty lines
@@ -779,7 +779,7 @@ gravity_ParseFileIntoDomains() {
     -e 's/\r$//' \
     -e 's/\s*!.*//g' \
     -e 's/\s*\[.*//g' \
-    -e '/\#[$?@]{0,1}\#/d' \
+    -e '/[a-z]\#[$?@]{0,1}\#/d' \
     -e 's/\s*#.*//g' \
     -e 's/^.*\s+//g' \
     -e '/^$/d' "${destination}"