docs: end sentences with a period in markdown (#7813)

cli/dts/README.md

@@ -5,8 +5,8 @@ currently (unfortunately) have a rather manual process for upgrading TypeScript.
 It works like this currently:
 
 1. Checkout typescript repo in a seperate directory.
-2. Copy typescript.js into Deno repo
-3. Copy d.ts files into dts directory
+2. Copy typescript.js into Deno repo.
+3. Copy d.ts files into dts directory.
 
 So that might look something like this:
 

cli/rt/README.md

@@ -22,14 +22,14 @@ Some Web APIs are using ops under the hood, eg. `console`, `performance`.
 ## Implemented Web APIs
 
 - [Blob](https://developer.mozilla.org/en-US/docs/Web/API/Blob): for
-  representing opaque binary data
+  representing opaque binary data.
 - [Console](https://developer.mozilla.org/en-US/docs/Web/API/Console): for
-  logging purposes
+  logging purposes.
 - [CustomEvent](https://developer.mozilla.org/en-US/docs/Web/API/CustomEvent),
   [EventTarget](https://developer.mozilla.org/en-US/docs/Web/API/EventTarget)
   and
   [EventListener](https://developer.mozilla.org/en-US/docs/Web/API/EventListener):
-  to work with DOM events
+  to work with DOM events.
   - **Implementation notes:** There is no DOM hierarchy in Deno, so there is no
     tree for Events to bubble/capture through.
 - [fetch](https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/fetch),
@@ -37,23 +37,23 @@ Some Web APIs are using ops under the hood, eg. `console`, `performance`.
   [Response](https://developer.mozilla.org/en-US/docs/Web/API/Response),
   [Body](https://developer.mozilla.org/en-US/docs/Web/API/Body) and
   [Headers](https://developer.mozilla.org/en-US/docs/Web/API/Headers): modern
-  Promise-based HTTP Request API
+  Promise-based HTTP Request API.
 - [FormData](https://developer.mozilla.org/en-US/docs/Web/API/FormData): access
-  to a `multipart/form-data` serialization
+  to a `multipart/form-data` serialization.
 - [Performance](https://developer.mozilla.org/en-US/docs/Web/API/Performance):
-  retrieving current time with a high precision
+  retrieving current time with a high precision.
 - [setTimeout](https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/setTimeout),
   [setInterval](https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/setInterval),
   [clearTimeout](https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/clearTimeout):
   scheduling callbacks in future and
-  [clearInterval](https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/clearInterval)
+  [clearInterval](https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/clearInterval).
 - [Stream](https://developer.mozilla.org/en-US/docs/Web/API/Streams_API) for
-  creating, composing, and consuming streams of data
+  creating, composing, and consuming streams of data.
 - [URL](https://developer.mozilla.org/en-US/docs/Web/API/URL) and
   [URLSearchParams](https://developer.mozilla.org/en-US/docs/Web/API/URLSearchParams):
-  to construct and parse URLSs
+  to construct and parse URLSs.
 - [Worker](https://developer.mozilla.org/en-US/docs/Web/API/Worker): executing
-  additional code in a separate thread
+  additional code in a separate thread.
   - **Implementation notes:** Blob URLs are not supported, object ownership
     cannot be transferred, posted data is serialized to JSON instead of
     [structured cloning](https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Structured_clone_algorithm).

cli/tests/unit/README.md

@@ -26,13 +26,13 @@ unitTest({
 `unitTest` is is a wrapper function that enhances `Deno.test()` API in several
 ways:
 
-- ability to conditionally skip tests using `UnitTestOptions.skip`
+- ability to conditionally skip tests using `UnitTestOptions.skip`.
 - ability to register required set of permissions for given test case using
-  `UnitTestOptions.perms`
+  `UnitTestOptions.perms`.
 - sanitization of resources - ensuring that tests close all opened resources
-  preventing interference between tests
+  preventing interference between tests.
 - sanitization of async ops - ensuring that tests don't leak async ops by
-  ensuring that all started async ops are done before test finishes
+  ensuring that all started async ops are done before test finishes.
 
 ## Running tests
 
@@ -50,13 +50,13 @@ There are three ways to run `unit_test_runner.ts`:
 target/debug/deno run -A cli/tests/unit/unit_test_runner.ts --master
 
 # By default all output of worker processes is discarded; for debug purposes
-# the --verbose flag preserves output from the worker
+# the --verbose flag preserves output from the worker.
 target/debug/deno run -A cli/tests/unit/unit_test_runner.ts --master --verbose
 
-# Run subset of tests that don't require any permissions
+# Run subset of tests that don't require any permissions.
 target/debug/deno run --unstable cli/tests/unit/unit_test_runner.ts
 
-# Run subset tests that require "net" and "read" permissions
+# Run subset tests that require "net" and "read" permissions.
 target/debug/deno run --unstable --allow-net --allow-read cli/tests/unit/unit_test_runner.ts
 
 # "worker" mode communicates with parent using TCP socket on provided address;
@@ -64,7 +64,7 @@ target/debug/deno run --unstable --allow-net --allow-read cli/tests/unit/unit_te
 # directly, only be "master" process.
 target/debug/deno run -A cli/tests/unit/unit_test_runner.ts --worker --addr=127.0.0.1:4500 --perms=net,write,run
 
-# Run specific tests
+# Run specific tests.
 target/debug/deno run --unstable --allow-net cli/tests/unit/unit_test_runner.ts -- netTcpListenClose
 
 RUST_BACKTRACE=1 cargo run -- run --unstable --allow-read --allow-write cli/tests/unit/unit_test_runner.ts -- netUnixDialListen