Ensure the exercises use the canonical format

Add the check-exercises.py tool in the new tools directory.  It is used
to check that the exercises are correctly formatted, printing on stderr
the invalid ones and the diff in the unified format.

Update the exercises that don't use the canonical zig fmt format.

Update some patches that cause the generated zig file to be incorrectly
formatted.

1 files changed, 14 insertions, 14 deletions

diff --git a/exercises/058_quiz7.zig b/exercises/058_quiz7.zig
index 3069710..1ceac5a 100644
--- a/exercises/058_quiz7.zig
+++ b/exercises/058_quiz7.zig
@@ -107,7 +107,7 @@ const Path = struct {
 const a_paths = [_]Path{
     Path{
         .from = &a, // from: Archer's Point
-        .to = &b,   //   to: Bridge
+        .to = &b, //   to: Bridge
         .dist = 2,
     },
 };
@@ -115,12 +115,12 @@ const a_paths = [_]Path{
 const b_paths = [_]Path{
     Path{
         .from = &b, // from: Bridge
-        .to = &a,   //   to: Archer's Point
+        .to = &a, //   to: Archer's Point
         .dist = 2,
     },
     Path{
         .from = &b, // from: Bridge
-        .to = &d,   //   to: Dogwood Grove
+        .to = &d, //   to: Dogwood Grove
         .dist = 1,
     },
 };
@@ -128,12 +128,12 @@ const b_paths = [_]Path{
 const c_paths = [_]Path{
     Path{
         .from = &c, // from: Cottage
-        .to = &d,   //   to: Dogwood Grove
+        .to = &d, //   to: Dogwood Grove
         .dist = 3,
     },
     Path{
         .from = &c, // from: Cottage
-        .to = &e,   //   to: East Pond
+        .to = &e, //   to: East Pond
         .dist = 2,
     },
 };
@@ -141,17 +141,17 @@ const c_paths = [_]Path{
 const d_paths = [_]Path{
     Path{
         .from = &d, // from: Dogwood Grove
-        .to = &b,   //   to: Bridge
+        .to = &b, //   to: Bridge
         .dist = 1,
     },
     Path{
         .from = &d, // from: Dogwood Grove
-        .to = &c,   //   to: Cottage
+        .to = &c, //   to: Cottage
         .dist = 3,
     },
     Path{
         .from = &d, // from: Dogwood Grove
-        .to = &f,   //   to: Fox Pond
+        .to = &f, //   to: Fox Pond
         .dist = 7,
     },
 };
@@ -159,20 +159,20 @@ const d_paths = [_]Path{
 const e_paths = [_]Path{
     Path{
         .from = &e, // from: East Pond
-        .to = &c,   //   to: Cottage
+        .to = &c, //   to: Cottage
         .dist = 2,
     },
     Path{
         .from = &e, // from: East Pond
-        .to = &f,   //   to: Fox Pond
-        .dist = 1,  // (one-way down a short waterfall!)
+        .to = &f, //   to: Fox Pond
+        .dist = 1, // (one-way down a short waterfall!)
     },
 };
 
 const f_paths = [_]Path{
     Path{
         .from = &f, // from: Fox Pond
-        .to = &d,   //   to: Dogwood Grove
+        .to = &d, //   to: Dogwood Grove
         .dist = 7,
     },
 };
@@ -355,8 +355,8 @@ pub fn main() void {
     // Here's where the hermit decides where he would like to go. Once
     // you get the program working, try some different Places on the
     // map!
-    const start = &a;        // Archer's Point
-    const destination = &f;  // Fox Pond
+    const start = &a; // Archer's Point
+    const destination = &f; // Fox Pond
 
     // Store each Path array as a slice in each Place. As mentioned
     // above, we needed to delay making these references to avoid