fix some of the typos in Maintaining.md

doc/HACKING/Maintaining.md

@@ -4,7 +4,7 @@ This document details the duties and processes on maintaining the Tor code
 base.
 
 The first section describes who is the current Tor maintainer and what are the
-responsabilities. Tor has one main single maintainer but does have many
+responsibilities. Tor has one main single maintainer but does have many
 committers and subsystem maintainers.
 
 The second third section describes how the **alpha and master** branches are
@@ -21,14 +21,14 @@ This document does not cover how Tor is released, please see
 The current maintainer is Nick Mathewson <nickm@torproject.org>.
 
 The maintainer takes final decisions in terms of engineering, architecture and
-protocol design. Releasing Tor falls under their responsability.
+protocol design. Releasing Tor falls under their responsibility.
 
 ## Alpha and Master Branches
 
-The Tor repository always has at all time a **master** branch which contains
+The Tor repository always has at all times a **master** branch which contains
 the upstream ongoing development.
 
-It may also contains a branch for a released feature freezed version which is
+It may also contain a branch for a released feature freezed version which is
 called the **alpha** branch. The git tag and version number is always
 postfixed with `-alpha[-dev]`. For example: `tor-0.3.5.0-alpha-dev` or
 `tor-0.3.5.3-alpha`.
@@ -39,7 +39,7 @@ code base but only commit (in most cases) into the subsystem they maintain.
 
 Upstream merges are restricted to the alpha and master branches. Subsystem
 maintainers should never push a patch into a stable branch which is the
-responsability of the [stable branch maintainer](#stable-branches).
+responsibility of the [stable branch maintainer](#stable-branches).
 
 ### Who
 
@@ -68,7 +68,7 @@ maintain the following subsystems:
 
 These are the tasks of a subsystem maintainer:
 
-1. Regurlarly go over `merge_ready` tickets relevant to the related subsystem
+1. Regularly go over `merge_ready` tickets relevant to the related subsystem
    and for the current alpha or development (master branch) Milestone.
 
 2. A subsystem maintainer is expected to contribute to any design changes
@@ -86,7 +86,7 @@ These are few important items to follow when merging code upstream:
    **at least** one person that is not the original coder.
 
    Example A: If Alice writes a patch then Bob, a Tor network team member,
-   reviews it and flags it `merge_ready`. Then, the maintainter is required
+   reviews it and flags it `merge_ready`. Then, the maintainer is required
    to look at the patch and makes a decision.
 
    Example B: If the maintainer writes a patch then Bob, a Tor network
@@ -100,7 +100,7 @@ These are few important items to follow when merging code upstream:
 3. Trivial patches such as comment change, documentation, syntax issues or
    typos can be merged without a ticket or reviewers.
 
-4. Tor uses the "merge forward" method that is if a patch applies to the
+4. Tor uses the "merge forward" method, that is, if a patch applies to the
    alpha branch, it has to be merged there first and then merged forward
    into master.