From c68440cad49f6d0cda09f8c7d4989ff63f55a26e Mon Sep 17 00:00:00 2001
From: Songbird0 <Songbird0@users.noreply.github.com>
Date: Sun, 4 Mar 2018 21:59:53 +0100
Subject: [PATCH 1/4] Add a potential cause raising `ParseIntError`.

Initially, I wanted to add it directly to the documentation of `str. parse()' method, I finally found that it was more relevant (I hope so?) to directly document the structure in question. I've added a scenario, in which we could all get caught at least once, to make it easier to diagnose the problem when parsing integers.
---
 src/libcore/num/mod.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/libcore/num/mod.rs b/src/libcore/num/mod.rs
index 59a67fff48cfe..1b51ebefb6041 100644
--- a/src/libcore/num/mod.rs
+++ b/src/libcore/num/mod.rs
@@ -3845,7 +3845,13 @@ fn from_str_radix<T: FromStrRadixHelper>(src: &str, radix: u32) -> Result<T, Par
 ///
 /// This error is used as the error type for the `from_str_radix()` functions
 /// on the primitive integer types, such as [`i8::from_str_radix`].
+/// 
+/// # Potential causes
 ///
+/// Among other causes, `ParseIntError` can be thrown because of leading or trailing whitespaces in the string e.g. when it is getted from the standard input. 
+/// Using the [`str.trim()`] method ensures that no whitespace remains before parsing.
+///
+/// [`str.trim()`]: ../../std/primitive.str.html#method.trim
 /// [`i8::from_str_radix`]: ../../std/primitive.i8.html#method.from_str_radix
 #[derive(Debug, Clone, PartialEq, Eq)]
 #[stable(feature = "rust1", since = "1.0.0")]

From 247fc38aebf752528078349f913764ba6a8edf59 Mon Sep 17 00:00:00 2001
From: Songbird0 <Songbird0@users.noreply.github.com>
Date: Sun, 4 Mar 2018 22:18:42 +0100
Subject: [PATCH 2/4] Tidy error: add a new line

The error was:

```
[00:05:25] tidy error: /checkout/src/libcore/num/mod.rs:3848: trailing whitespace
[00:05:25] tidy error: /checkout/src/libcore/num/mod.rs:3851: line longer than 100 chars
[00:05:25] tidy error: /checkout/src/libcore/num/mod.rs:3851: trailing whitespace
[00:05:26] some tidy checks failed
```
The line was truncated to 92 characters.
---
 src/libcore/num/mod.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/libcore/num/mod.rs b/src/libcore/num/mod.rs
index 1b51ebefb6041..00a46dca87601 100644
--- a/src/libcore/num/mod.rs
+++ b/src/libcore/num/mod.rs
@@ -3848,7 +3848,8 @@ fn from_str_radix<T: FromStrRadixHelper>(src: &str, radix: u32) -> Result<T, Par
 /// 
 /// # Potential causes
 ///
-/// Among other causes, `ParseIntError` can be thrown because of leading or trailing whitespaces in the string e.g. when it is getted from the standard input. 
+/// Among other causes, `ParseIntError` can be thrown because of leading or trailing whitespaces 
+/// in the string e.g. when it is getted from the standard input. 
 /// Using the [`str.trim()`] method ensures that no whitespace remains before parsing.
 ///
 /// [`str.trim()`]: ../../std/primitive.str.html#method.trim

From ef1aae1cc2310ae6c05bed273da55a9ba85b1ef5 Mon Sep 17 00:00:00 2001
From: Songbird0 <Songbird0@users.noreply.github.com>
Date: Mon, 5 Mar 2018 03:57:33 +0100
Subject: [PATCH 3/4] Modify wording and remove useless whitespaces.

---
 src/libcore/num/mod.rs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/libcore/num/mod.rs b/src/libcore/num/mod.rs
index 00a46dca87601..8b43aeefade5c 100644
--- a/src/libcore/num/mod.rs
+++ b/src/libcore/num/mod.rs
@@ -3845,11 +3845,11 @@ fn from_str_radix<T: FromStrRadixHelper>(src: &str, radix: u32) -> Result<T, Par
 ///
 /// This error is used as the error type for the `from_str_radix()` functions
 /// on the primitive integer types, such as [`i8::from_str_radix`].
-/// 
+///
 /// # Potential causes
 ///
-/// Among other causes, `ParseIntError` can be thrown because of leading or trailing whitespaces 
-/// in the string e.g. when it is getted from the standard input. 
+/// Among other causes, `ParseIntError` can be thrown because of leading or trailing whitespaces
+/// in the string e.g. when it is obtained from the standard input.
 /// Using the [`str.trim()`] method ensures that no whitespace remains before parsing.
 ///
 /// [`str.trim()`]: ../../std/primitive.str.html#method.trim

From 6d71aa47fbcaeb0493ac1bbc4408b513f6108fd0 Mon Sep 17 00:00:00 2001
From: Songbird0 <Songbird0@users.noreply.github.com>
Date: Mon, 5 Mar 2018 14:33:37 +0100
Subject: [PATCH 4/4] Fix spelling error for `whitespaces`.

---
 src/libcore/num/mod.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libcore/num/mod.rs b/src/libcore/num/mod.rs
index 8b43aeefade5c..929d6ef4c200f 100644
--- a/src/libcore/num/mod.rs
+++ b/src/libcore/num/mod.rs
@@ -3848,7 +3848,7 @@ fn from_str_radix<T: FromStrRadixHelper>(src: &str, radix: u32) -> Result<T, Par
 ///
 /// # Potential causes
 ///
-/// Among other causes, `ParseIntError` can be thrown because of leading or trailing whitespaces
+/// Among other causes, `ParseIntError` can be thrown because of leading or trailing whitespace
 /// in the string e.g. when it is obtained from the standard input.
 /// Using the [`str.trim()`] method ensures that no whitespace remains before parsing.
 ///