doc: Title guides consistently

Author: brson

doc/guide-conditions.md

@@ -1,4 +1,4 @@
-% Rust Condition and Error-handling Guide
+% The Rust Condition and Error-handling Guide
 
 # Introduction
 

doc/guide-container.md

@@ -1,4 +1,4 @@
-% Containers and Iterators Guide
+% The Rust Containers and Iterators Guide
 
 # Containers
 

doc/guide-ffi.md

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-% Rust Foreign Function Interface Guide
+% The Rust Foreign Function Interface Guide
 
 # Introduction
 

doc/guide-lifetimes.md

@@ -1,4 +1,4 @@
-% Rust Borrowed Pointers Guide
+% The Rust Borrowed Pointers and Lifetimes Guide
 
 # Introduction
 

doc/guide-macros.md

@@ -1,4 +1,4 @@
-% Rust Macros Guide
+% The Rust Macros Guide
 
 # Introduction
 

doc/guide-rustpkg.md

@@ -1,4 +1,4 @@
-% Rust Packaging Guide
+% The Rust Packaging Guide
 
 # Introduction
 

doc/guide-tasks.md

@@ -1,4 +1,4 @@
-% Rust Tasks and Communication Guide
+% The Rust Tasks and Communication Guide
 
 # Introduction
 

doc/guide-testing.md

@@ -1,4 +1,4 @@
-% Rust Testing Guide
+% The Rust Testing Guide
 
 # Quick start