We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
Change __version__ to match pep 440
Specifically, when a branch is specified, it should use a plus sign instead of minus

https://www.python.org/dev/peps/pep-0440/#local-version-identifiers

https://github.com/wright-group/WrightTools/blob/490a4a3d6fb6f016e7033d661b553b72c2d86fcb/WrightTools/__version__.py#L33

--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `WrightTools/__version__.py`
Content:
```
1 """Define WrightTools version."""
2 
3 
4 # --- import --------------------------------------------------------------------------------------
5 
6 
7 import os
8 
9 
10 # ---- define -------------------------------------------------------------------------------------
11 
12 
13 here = os.path.abspath(os.path.dirname(__file__))
14 
15 
16 __all__ = ['__version__', '__branch__']
17 
18 
19 # --- version -------------------------------------------------------------------------------------
20 
21 
22 # read from VERSION file
23 with open(os.path.join(os.path.dirname(here), 'VERSION')) as f:
24     __version__ = f.read().strip()
25 
26 
27 # add git branch, if appropriate
28 p = os.path.join(os.path.dirname(here), '.git', 'HEAD')
29 if os.path.isfile(p):
30     with open(p) as f:
31         __branch__ = f.readline().rstrip().split(r'/')[-1]
32     if __branch__ != 'master':
33         __version__ += '-' + __branch__
34 else:
35     __branch__ = None
36
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/WrightTools/__version__.py b/WrightTools/__version__.py
--- a/WrightTools/__version__.py
+++ b/WrightTools/__version__.py
@@ -30,6 +30,6 @@
     with open(p) as f:
         __branch__ = f.readline().rstrip().split(r'/')[-1]
     if __branch__ != 'master':
-        __version__ += '-' + __branch__
+        __version__ += '+' + __branch__
 else:
     __branch__ = None

{"golden_diff": "diff --git a/WrightTools/__version__.py b/WrightTools/__version__.py\n--- a/WrightTools/__version__.py\n+++ b/WrightTools/__version__.py\n@@ -30,6 +30,6 @@\n     with open(p) as f:\n         __branch__ = f.readline().rstrip().split(r'/')[-1]\n     if __branch__ != 'master':\n-        __version__ += '-' + __branch__\n+        __version__ += '+' + __branch__\n else:\n     __branch__ = None\n", "issue": "Change __version__ to match pep 440\nSpecifically, when a branch is specified, it should use a plus sign instead of minus\r\n\r\nhttps://www.python.org/dev/peps/pep-0440/#local-version-identifiers\r\n\r\nhttps://github.com/wright-group/WrightTools/blob/490a4a3d6fb6f016e7033d661b553b72c2d86fcb/WrightTools/__version__.py#L33\n", "before_files": [{"content": "\"\"\"Define WrightTools version.\"\"\"\n\n\n# --- import --------------------------------------------------------------------------------------\n\n\nimport os\n\n\n# ---- define -------------------------------------------------------------------------------------\n\n\nhere = os.path.abspath(os.path.dirname(__file__))\n\n\n__all__ = ['__version__', '__branch__']\n\n\n# --- version -------------------------------------------------------------------------------------\n\n\n# read from VERSION file\nwith open(os.path.join(os.path.dirname(here), 'VERSION')) as f:\n    __version__ = f.read().strip()\n\n\n# add git branch, if appropriate\np = os.path.join(os.path.dirname(here), '.git', 'HEAD')\nif os.path.isfile(p):\n    with open(p) as f:\n        __branch__ = f.readline().rstrip().split(r'/')[-1]\n    if __branch__ != 'master':\n        __version__ += '-' + __branch__\nelse:\n    __branch__ = None\n", "path": "WrightTools/__version__.py"}], "after_files": [{"content": "\"\"\"Define WrightTools version.\"\"\"\n\n\n# --- import --------------------------------------------------------------------------------------\n\n\nimport os\n\n\n# ---- define -------------------------------------------------------------------------------------\n\n\nhere = os.path.abspath(os.path.dirname(__file__))\n\n\n__all__ = ['__version__', '__branch__']\n\n\n# --- version -------------------------------------------------------------------------------------\n\n\n# read from VERSION file\nwith open(os.path.join(os.path.dirname(here), 'VERSION')) as f:\n    __version__ = f.read().strip()\n\n\n# add git branch, if appropriate\np = os.path.join(os.path.dirname(here), '.git', 'HEAD')\nif os.path.isfile(p):\n    with open(p) as f:\n        __branch__ = f.readline().rstrip().split(r'/')[-1]\n    if __branch__ != 'master':\n        __version__ += '+' + __branch__\nelse:\n    __branch__ = None\n", "path": "WrightTools/__version__.py"}]}