docs: improve grammatical flow

docs/usage.md

@@ -50,7 +50,7 @@ Poac uses a cache since we executed the command with no changes.
 
 ## Install dependencies
 
-Like Cargo does, Poac installs dependencies at build time.  Poac currently supports Git, path, and system dependencies.  You can use two methods to add dependencies to your project: the `poac add` command, and editing `poac.toml` directly.
+Like Cargo does, Poac installs dependencies at build time.  Poac currently supports Git, path, and system dependencies.  You can use two ways to add dependencies to your project: using the `poac add` command and editing `poac.toml` directly.
 
 ### `poac add`
 
@@ -71,11 +71,9 @@ poac add libgit2 --sys --version "1.1.0"
 poac add "ToruNiina/toml11" --rev "846abd9a49082fe51440aa07005c360f13a67bbf"
 ```
 
-If `tag`, `branch`, or `rev` is unspecified for git dependencies, Poac will use the latest revision of the default branch. System dependency names must be acceptable by `pkg-config`. The version requirement syntax is specified in [src/VersionReq.hpp](https://github.com/poac-dev/poac/blob/main/src/VersionReq.hpp).
-
-### editing `poac.toml` directly
+### Editing `poac.toml` directly
 
-The syntax for `poac.toml` like below:
+The syntax for `poac.toml` is as follows:
 
 ```toml
 [dependencies]
@@ -92,7 +90,6 @@ fmt = { version = ">= 9", system = true }
 
 If `tag`, `branch`, or `rev` is unspecified for git dependencies, Poac will use the latest revision of the default branch. System dependency names must be acceptable by `pkg-config`. The version requirement syntax is specified in [src/VersionReq.hpp](https://github.com/poac-dev/poac/blob/main/src/VersionReq.hpp).
 
-
 After adding dependencies, executing the `build` command will install the package and its dependencies.
 
 ```console