tour: uniform the use of bold for Notes

A few tour slides end with a Note with some additional remarks. Most
of the times the word "Note:" is in bold, and the next word is
capitalized, except in a few places. Uniform the style by making it
always bold and by always capitalizing the sentence.

Change-Id: Ib5843a55c0e9a4f602efa0346f96702493a7284a
Reviewed-on: https://go-review.googlesource.com/123215
Reviewed-by: Andrew Bonventre <andybons@golang.org>

5 files changed, 6 insertions, 6 deletions

diff --git a/content/basics.article b/content/basics.article
index 528eaf1..082a6ab 100644
--- a/content/basics.article
+++ b/content/basics.article
@@ -14,7 +14,7 @@ This program is using the packages with import paths `"fmt"` and `"math/rand"`.
 
 By convention, the package name is the same as the last element of the import path. For instance, the `"math/rand"` package comprises files that begin with the statement `package`rand`.
 
-#appengine: *Note:* the environment in which these programs are executed is
+#appengine: *Note:* The environment in which these programs are executed is
 #appengine: deterministic, so each time you run the example program
 #appengine: `rand.Intn` will return the same number.
 #appengine:
diff --git a/content/concurrency.article b/content/concurrency.article
index 913c727..b6bd509 100644
--- a/content/concurrency.article
+++ b/content/concurrency.article
@@ -65,7 +65,7 @@ The loop `for`i`:=`range`c` receives values from the channel repeatedly until it
 
 *Note:* Only the sender should close a channel, never the receiver. Sending on a closed channel will cause a panic.
 
-*Another*note*: Channels aren't like files; you don't usually need to close them. Closing is only necessary when the receiver must be told there are no more values coming, such as to terminate a `range` loop.
+*Another*note:* Channels aren't like files; you don't usually need to close them. Closing is only necessary when the receiver must be told there are no more values coming, such as to terminate a `range` loop.
 
 .play concurrency/range-and-close.go
 
diff --git a/content/flowcontrol.article b/content/flowcontrol.article
index a67d7ec..c8bcd5c 100644
--- a/content/flowcontrol.article
+++ b/content/flowcontrol.article
@@ -20,7 +20,7 @@ statement.
 
 The loop will stop iterating once the boolean condition evaluates to `false`.
 
-_Note_: Unlike other languages like C, Java, or JavaScript there are no parentheses
+*Note:* Unlike other languages like C, Java, or JavaScript there are no parentheses
 surrounding the three components of the `for` statement and the braces `{`}` are
 always required.
 
@@ -102,7 +102,7 @@ See if that's more or fewer than 10 iterations.
 Try other initial guesses for z, like x, or x/2.
 How close are your function's results to the [[https://golang.org/pkg/math/#Sqrt][math.Sqrt]] in the standard library?
 
-(Note: If you are interested in the details of the algorithm, the z² − x above
+(*Note:* If you are interested in the details of the algorithm, the z² − x above
 is how far away z² is from where it needs to be (x), and the division by 2z is the derivative
 of z², to scale how much we adjust z by how quickly z² is changing.
 This general approach is called [[https://en.wikipedia.org/wiki/Newton%27s_method][Newton's method]].
diff --git a/content/methods.article b/content/methods.article
index 5ad5cc8..83c9d7a 100644
--- a/content/methods.article
+++ b/content/methods.article
@@ -332,7 +332,7 @@ and make it an `error` by giving it a
 
 method such that `ErrNegativeSqrt(-2).Error()` returns `"cannot`Sqrt`negative`number:`-2"`.
 
-*Note:* a call to `fmt.Sprint(e)` inside the `Error` method will send the program into an infinite loop. You can avoid this by converting `e` first: `fmt.Sprint(float64(e))`. Why?
+*Note:* A call to `fmt.Sprint(e)` inside the `Error` method will send the program into an infinite loop. You can avoid this by converting `e` first: `fmt.Sprint(float64(e))`. Why?
 
 Change your `Sqrt` function to return an `ErrNegativeSqrt` value when given a negative number.
 
diff --git a/content/moretypes.article b/content/moretypes.article
index 2840489..955214e 100644
--- a/content/moretypes.article
+++ b/content/moretypes.article
@@ -309,7 +309,7 @@ If `key` is in `m`, `ok` is `true`. If not, `ok` is `false`.
 
 If `key` is not in the map, then `elem` is the zero value for the map's element type.
 
-_Note_: if `elem` or `ok` have not yet been declared you could use a short declaration form:
+*Note:* If `elem` or `ok` have not yet been declared you could use a short declaration form:
 
 	elem, ok := m[key]