diff --git a/aider/coders/udiff_prompts.py b/aider/coders/udiff_prompts.py
index 4ab30bfc4..8608152ad 100644
--- a/aider/coders/udiff_prompts.py
+++ b/aider/coders/udiff_prompts.py
@@ -5,7 +5,9 @@ from .base_prompts import CoderPrompts
 
 class UnifiedDiffPrompts(CoderPrompts):
     main_system = """Act as an expert software developer.
-You are diligent and tireless, and you always COMPLETELY IMPLEMENT the needed code.
+You are diligent and tireless!
+You NEVER leave comments describing code without implementing it!
+You always COMPLETELY IMPLEMENT the needed code!
 Always use best practices when coding.
 Respect and use existing conventions, libraries, etc that are already present in the code base.
 
@@ -95,6 +97,10 @@ Delete the entire existing version with `-` lines and then add a new, updated ve
 This will help you generate correct code and correct diffs.
 
 To make a new file, show a diff from `--- /dev/null` to `+++ path/to/new/file.ext`.
+
+You are diligent and tireless!
+You NEVER leave comments describing code without implementing it!
+You always COMPLETELY IMPLEMENT the needed code!
 """
 
     files_content_prefix = "These are the *read-write* files:\n"
diff --git a/benchmark/refactor_tools.py b/benchmark/refactor_tools.py
index a54663377..a29aa6e9a 100755
--- a/benchmark/refactor_tools.py
+++ b/benchmark/refactor_tools.py
@@ -132,7 +132,10 @@ def find_non_self_methods(path):
     non_self_methods = []
     for filename in python_files:
         with open(filename, "r") as file:
-            node = ast.parse(file.read(), filename=filename)
+            try:
+                node = ast.parse(file.read(), filename=filename)
+            except:
+                pass
             checker = SelfUsageChecker()
             checker.visit(node)
             for method in checker.non_self_methods:
@@ -145,7 +148,7 @@ def process(entry):
     fname, class_name, method_name, class_children, method_children = entry
     if method_children > class_children / 2:
         return
-    if method_children < 100:
+    if method_children < 250:
         return
 
     fname = Path(fname)
@@ -154,7 +157,7 @@ def process(entry):
 
     print(f"{fname} {class_name} {method_name} {class_children} {method_children}")
 
-    dname = Path("tmp.benchmarks/refactor-benchmark")
+    dname = Path("tmp.benchmarks/refactor-benchmark-pylint")
     dname.mkdir(exist_ok=True)
 
     dname = dname / f"{fname.stem}_{class_name}_{method_name}"
diff --git a/docs/unified-diffs.md b/docs/unified-diffs.md
index fe28fd8f5..9cc328155 100644
--- a/docs/unified-diffs.md
+++ b/docs/unified-diffs.md
@@ -79,8 +79,8 @@ code edits, because it's the
 default output format of `git diff`:
 
 ```diff
---- a/hello.py
-+++ b/hello.py
+--- a/greeting.py
++++ b/greeting.py
 @@ -1,5 +1,5 @@
  def main(args):
      # show a greeting
@@ -246,6 +246,7 @@ They exhibit a variety of problems:
 
 - GPT forgets things like comments, docstrings, blank lines, etc. Or it skips over some code that it doesn't intend to change.
 - GPT forgets the leading *plus* `+` character to mark novel lines that it wants to add to the file. It incorrectly includes them with a leading *space* as if they were already there.
+- GPT outdents all of the code, removing all the leading white space which is shared across the lines. So a chunk of deeply indented code is shown in a diff with only the leading white space that changes between the lines in the chunk.
 - GPT jumps ahead to show edits to a different part of the file without starting a new hunk with a `@@ ... @@` divider.
 
 As an example of the first issue, consider this source code:
@@ -285,6 +286,7 @@ If a hunk doesn't apply cleanly, aider uses a number of strategies:
 
 - Normalize the hunk, by taking the *minus* `-` and *space* lines as one version of the hunk and the *space* and *plus* `+` lines as a second version and doing an actual unified diff on them.
 - Try and discover new lines that GPT is trying to add but which it forgot to mark with *plus* `+` markers. This is done by diffing the *minus* `-` and *space* lines back against the original file.
+- Try and apply the hunk using "relative leading white space", so we can match and patch correctly even if the hunk has been uniformly indented or outdented.
 - Break a large hunk apart into an overlapping sequence of smaller hunks, which each contain only one contiguous run of *plus* `+` and *minus* `-` lines. Try and apply each of these sub-hunks independently.
 - Vary the size and offset of the "context window" of *space*  lines from the hunk that are used to localize the edit to a specific part of the file.
 - Combine the above mechanisms to progressively become more permissive about how to apply the hunk.