Don't generate table of contents for stacks with just 1 PR.

stack-info: PR: #103, branch: ZolotukhinM/stack/1

Author: ZolotukhinM

src/stack_pr/cli.py

@@ -762,6 +762,10 @@ def create_pr(e: StackEntry, *, is_draft: bool, reviewer: str = "") -> None:
 
 
 def generate_toc(st: list[StackEntry], current: str) -> str:
+    # Don't generate TOC for single PR
+    if len(st) == 1:
+        return ""
+
     def toc_entry(se: StackEntry) -> str:
         pr_id = last(se.pr)
         arrow = "__->__" if pr_id == current else ""
@@ -791,10 +795,16 @@ def add_cross_links(st: list[StackEntry], *, keep_body: bool, verbose: bool) ->
 
         # Strip stack-info from the body, nothing interesting there.
         body = RE_STACK_INFO_LINE.sub("", body)
-        pr_body = [
-            f"{pr_toc}",
-            f"{CROSS_LINKS_DELIMETER}\n",
-        ]
+        pr_body = []
+
+        # Only add TOC and delimiter if there are multiple PRs in the stack
+        if pr_toc:
+            pr_body.extend(
+                [
+                    f"{pr_toc}",
+                    f"{CROSS_LINKS_DELIMETER}\n",
+                ]
+            )
 
         if keep_body:
             # Keep current body of the PR after the cross links component