Fixed changelog generation script

A few bash-fu problems where fiddling with markdown formatting, fixed that.

.github/generate_change_log.sh

@@ -1,36 +1,41 @@
 #!/usr/bin/env bash
-checksum() {
-    echo $(sha256sum $@ | awk '{print $1}')
-}
 
-change_log_file="./CHANGELOG.md"
-version="## $@"
-version_prefix="## [0-9]{1,2}\."
-start=0
-CHANGE_LOG=""
-while read line; do
+
+main() {
+  change_log_file="./CHANGELOG.md"
+  version="## $@"
+  version_prefix="## [0-9]{1,2}\."
+  start=0
+  CHANGE_LOG=""
+  while IFS= read line; do
     if [[ $line == *"$version"* ]]; then
-        start=1
-        continue
+      start=1
+      continue
     fi
     if [[ $line =~ $version_prefix ]] && [ $start == 1 ]; then
-        break;
+      break;
     fi
     if [ $start == 1 ]; then
-        CHANGE_LOG+="$line\n"
+      CHANGE_LOG+="$line\n"
     fi
-done < ${change_log_file}
+  done < ${change_log_file}
+  LINUX_X86_64_BIN_SUM="$(checksum ./linux-x86_64-unknown-linux-gnu)"
 
-LINUX_X86_64_BIN_SUM="$(checksum ./linux-x86_64-unknown-linux-gnu)"
-
-OUTPUT=$(cat <<-END
-## Changelog\n
-${CHANGE_LOG}\n
-## Checksums\n
-|    Assets    | Sha256 Checksum  |\n
-| :-----------: |------------|\n
-| thegarii-linux-x86-64 | ${LINUX_X86_64_BIN_SUM} |\n
+  OUTPUT="$(cat <<-END
+## Changelog
+${CHANGE_LOG}
+## Checksums
+|Assets | Checksum (sha256)|
+|-|-|
+|thegarii-linux-x86-64 | ${LINUX_X86_64_BIN_SUM}|
 END
-)
+)"
+
+  echo -e "${OUTPUT}"
+}
+
+checksum() {
+  echo $(sha256sum $@ | awk '{print $1}')
+}
 
-echo -e ${OUTPUT}
+main $@