Updated formatting documentation

docsrc/formatting-context.md

@@ -0,0 +1,56 @@
+# Formatting context
+
+These fields are available for
+
+- version serializing
+- searching and replacing in files
+- commit messages
+- tag names
+- tag annotations
+
+## Escaped characters
+
+**`#`** The literal hash or [octothorpe](https://www.merriam-webster.com/dictionary/octothorpe) character.
+
+**`;`** The literal semicolon character.
+
+
+## Date and time fields
+
+**`now`** A Python datetime object representing the current local time, without a time zone reference.
+
+**`utcnow`** A Python datetime object representing the current local time in the UTC time zone.
+
+You can provide [additional formatting guidance](https://docs.python.org/3.11/library/datetime.html#strftime-and-strptime-format-codes) for datetime objects using formatting codes. Put the formatting codes after the field and a colon. For example, `{now:%Y-%m-%d}` would output the current local time as `2023-04-20`.
+
+## Source code management fields
+
+These fields will only have values if the code is in a Git or Mercurial repository.
+
+**`commit_sha`** The latest commit reference.
+
+**`distance_to_latest_tag`** The number of commits since the latest tag.
+
+**`dirty`** A boolean indicating if the current repository has pending changes.
+
+## Version fields
+
+**`current_version`** The current version serialized as a string
+
+**`current_<version part>`** Each version part defined by the [version configuration parsing regular expression](version-parts.md#version-configuration). The default configuration would have `current_major`, `current_minor`, and `current_patch` available.
+
+**`new_version`** The new version serialized as a string
+
+**`new_<version part>`** Each version part defined by the [version configuration parsing regular expression](version-parts.md#version-configuration). The default configuration would have `new_major`, `new_minor`, and `new_patch` available.
+
+:::{note}
+The following fields are only available when serializing a version.
+:::
+
+**`<version part>`** Each version part defined by the [version configuration parsing regular expression](version-parts.md#version-configuration). The default configuration would have `major`, `minor`, and `patch` available.
+
+## Environment variables
+
+Every environment variable available at runtime is included with a `$` prefix. For example if `USER` was in the environment, `{$USER}` would render that value.
+
+If you use environment variables in your version serialization, you might want to ensure they are set by executing `export VAR=value` before running the `bump-my-version` command.

docsrc/index.md

@@ -8,6 +8,9 @@ caption: Contents
 Introduction <readme>
 usage
 configuration
+version-parts
+formatting-context
+search-and-replace
 cli
 api
 contributing

docsrc/search-and-replace.md

@@ -13,7 +13,7 @@ using this `.bumpversion.toml` will ensure only the line containing `MyProject`
 [tool.bumpversion]
 current_version = "1.5.6"
 
-[[tool.bumpversion:files]]
+[[tool.bumpversion.files]]
 filename = "requirements.txt"
 search = "MyProject=={current_version}"
 replace = "MyProject=={new_version}"