use more robust version replacement

Author: softwareengineerprogrammer

.bumpversion.cfg

@@ -4,22 +4,22 @@ commit = True
 tag = True
 parse = (?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)(\-(?P<prerelease_label>[a-z]+)\.(?P<prerelease>\d+))?
 serialize =
-	{major}.{minor}.{patch}-{prerelease_label}.{prerelease}
-	{major}.{minor}.{patch}
+    {major}.{minor}.{patch}-{prerelease_label}.{prerelease}
+    {major}.{minor}.{patch}
 
 [bumpversion:part:prerelease]
 first_value = 0
 
 [bumpversion:part:prerelease_label]
 optional_value = rc
 values =
-	alpha
-	beta
-	rc
+    alpha
+    beta
+    rc
 
 [bumpversion:file:setup.py]
-search = version='{current_version}'
-replace = version='{new_version}'
+search = (?<=version=')({current_version})(?=')
+replace = {new_version}
 
 [bumpversion:file (badge):README.rst]
 search = /v{current_version}.svg
@@ -30,15 +30,15 @@ search = /v{current_version}...main
 replace = /v{new_version}...main
 
 [bumpversion:file:docs/conf.py]
-search = version = '{current_version}'
-replace = version = '{new_version}'
+search = (?<=version = '){current_version}
+replace = {new_version}
 
 [bumpversion:file:src/geophires_x/__init__.py]
-search = __version__ = '{current_version}'
-replace = __version__ = '{new_version}'
+search = (?<=__version__ = '){current_version}
+replace = {new_version}
 
 [bumpversion:file:.cookiecutterrc]
-search = version: {current_version}
-replace = version: {new_version}
+search = (?<=version: ){current_version}
+replace = {new_version}
 
 [bumpversion:part:release]