Update check_xrefs.sh (#10343)

Skip those with spaces that aren't actually xrefs

Author: shoumikhin

.github/workflows/doc-build.yml

@@ -21,12 +21,12 @@ jobs:
       - name: Check URLs
         run: bash ./scripts/check_urls.sh
 
-  check-links:
+  check-xrefs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
       - name: Check Links
-        run: bash ./scripts/check_links.sh
+        run: bash ./scripts/check_xrefs.sh
 
   build:
     uses: pytorch/test-infra/.github/workflows/linux_job_v2.yml@main

scripts/check_links.sh renamed to scripts/check_xrefs.sh

@@ -24,7 +24,7 @@ while IFS=: read -r filepath link; do
   fi
 done < <(
   git --no-pager grep --no-color -I -o -E \
-    '\[[^]]+\]\([^)]*/[^)]*\)|href="[^"]*/[^"]*"|src="[^"]*/[^"]*"' \
+    '\[[^]]+\]\([^[:space:])]*/[^[:space:])]*\)|href="[^"]*/[^"]*"|src="[^"]*/[^"]*"' \
     -- '*' \
     ':(exclude).*' \
     ':(exclude)**/.*' \