From 38f9cd4d696a729dcf832a62af0f2eb43908bafb Mon Sep 17 00:00:00 2001
From: Guillaume Gomez <guillaume1.gomez@gmail.com>
Date: Wed, 27 Nov 2019 13:51:38 +0100
Subject: [PATCH 1/3] Clean up E0080 long explanation

---
 src/librustc_error_codes/error_codes/E0080.md | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/librustc_error_codes/error_codes/E0080.md b/src/librustc_error_codes/error_codes/E0080.md
index 262bf00d38540..273238a943b4f 100644
--- a/src/librustc_error_codes/error_codes/E0080.md
+++ b/src/librustc_error_codes/error_codes/E0080.md
@@ -1,14 +1,18 @@
-This error indicates that the compiler was unable to sensibly evaluate a
-constant expression that had to be evaluated. Attempting to divide by 0
-or causing integer overflow are two ways to induce this error. For example:
+A constant value failed to get evaluated.
+
+Erroneous code example:
 
 ```compile_fail,E0080
 enum Enum {
     X = (1 << 500),
-    Y = (1 / 0)
+    Y = (1 / 0),
 }
 ```
 
+This error indicates that the compiler was unable to sensibly evaluate a
+constant expression that had to be evaluated. Attempting to divide by 0
+or causing an integer overflow are two ways to induce this error.
+
 Ensure that the expressions given can be evaluated as the desired integer type.
 See the FFI section of the Reference for more information about using a custom
 integer type:

From ce696101c492964c31d5f368b27e6f2027af8f07 Mon Sep 17 00:00:00 2001
From: Guillaume Gomez <guillaume1.gomez@gmail.com>
Date: Wed, 27 Nov 2019 13:51:44 +0100
Subject: [PATCH 2/3] Clean up E0081 long explanation

---
 src/librustc_error_codes/error_codes/E0081.md | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/src/librustc_error_codes/error_codes/E0081.md b/src/librustc_error_codes/error_codes/E0081.md
index ec88ca9765e29..fd5eca68e21fd 100644
--- a/src/librustc_error_codes/error_codes/E0081.md
+++ b/src/librustc_error_codes/error_codes/E0081.md
@@ -1,21 +1,23 @@
-Enum discriminants are used to differentiate enum variants stored in memory.
-This error indicates that the same value was used for two or more variants,
-making them impossible to tell apart.
+A discrimant value is present more than once.
+
+Erroneous code example:
 
 ```compile_fail,E0081
-// Bad.
 enum Enum {
     P = 3,
-    X = 3,
+    X = 3, // error!
     Y = 5,
 }
 ```
 
+Enum discriminants are used to differentiate enum variants stored in memory.
+This error indicates that the same value was used for two or more variants,
+making it impossible to distinguish them.
+
 ```
-// Good.
 enum Enum {
     P,
-    X = 3,
+    X = 3, // ok!
     Y = 5,
 }
 ```
@@ -27,7 +29,7 @@ variants.
 ```compile_fail,E0081
 enum Bad {
     X,
-    Y = 0
+    Y = 0, // error!
 }
 ```
 

From 7edaebaf6ab309bd4730988ac5978c42a9159fea Mon Sep 17 00:00:00 2001
From: Guillaume Gomez <guillaume1.gomez@gmail.com>
Date: Wed, 27 Nov 2019 13:51:50 +0100
Subject: [PATCH 3/3] Clean up E0091 long explanation

---
 src/librustc_error_codes/error_codes/E0091.md | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/librustc_error_codes/error_codes/E0091.md b/src/librustc_error_codes/error_codes/E0091.md
index 2a092402429f1..03cb32803715e 100644
--- a/src/librustc_error_codes/error_codes/E0091.md
+++ b/src/librustc_error_codes/error_codes/E0091.md
@@ -1,5 +1,6 @@
-You gave an unnecessary type or const parameter in a type alias. Erroneous
-code example:
+An unnecessary type or const parameter was given in a type alias.
+
+Erroneous code example:
 
 ```compile_fail,E0091
 type Foo<T> = u32; // error: type parameter `T` is unused