Mass-replace tabs with 4-width spacing

This seems to be the predominant choice, and matches the last commit I
just made, so I went ahead and converted them all, and changed any, -
for example, 2-space indents.

Let me know if this is undesired.

To understand why I chose to do this, please refer to the previous
commit's message.

sheets/_cpp/func

@@ -26,4 +26,3 @@ int functionName(int &referenceName) {}
 
 // Pass by value (the caller and callee have two independent variables with the same value)
 int functionName(int valueName) {}
-

sheets/_cpp/pointers

@@ -1,8 +1,15 @@
-int *int_Ptr;     		// Declare a pointer variable called iPtr pointing to an int (an int pointer)
+// Declare a pointer variable called iPtr pointing to an int (an int pointer)
 // It contains an address. That address holds an int value.
-double *double_Ptr;  	// Declare a pointer of type double.
+int *int_Ptr;
 
-int a = 5;				// Initializes a to the integer value 5 
-int *int_Ptr = &a		// Set int_Ptr which is an int pointer to the address of a
-std::cout << int_Ptr;	// Returns the address of a 
-std::cout << *int_Ptr;	// Returns 5 because it dereference the pointer to retrieve the value of a.
+// Declare a pointer of type double.
+double *double_Ptr;
+
+// Initializes a to the integer value 5
+int a = 5;
+// Set int_Ptr which is an int pointer to the address of `a`.
+int *int_Ptr = &a
+// Returns the address of `a`.
+std::cout << int_Ptr;
+// Returns 5 because it dereference the pointer to retrieve the value of `a`.
+std::cout << *int_Ptr;

sheets/_go/slices

@@ -1,14 +1,24 @@
-var a []int                              // declare a slice - similar to an array, but length is unspecified
-var a = []int {1, 2, 3, 4}               // declare and initialize a slice (backed by the array given implicitly)
-a := []int{1, 2, 3, 4}                   // shorthand
-chars := []string{0:"a", 2:"c", 1: "b"}  // ["a", "b", "c"]
+// declare a slice - similar to an array, but length is unspecified
+var a []int
+// declare and initialize a slice (backed by the array given implicitly)
+var a = []int {1, 2, 3, 4}
+// shorthand
+a := []int{1, 2, 3, 4}
+// ["a", "b", "c"]
+chars := []string{0:"a", 2:"c", 1: "b"}
 
-var b = a[lo:hi]	// creates a slice (view of the array) from index lo to hi-1
-var b = a[1:4]		// slice from index 1 to 3
-var b = a[:3]		// missing low index implies 0
-var b = a[3:]		// missing high index implies len(a)
-a =  append(a,17,3)	// append items to slice a
-c := append(a,b...)	// concatenate slices a and b
+// creates a slice (view of the array) from index lo to hi-1
+var b = a[lo:hi]
+// slice from index 1 to 3
+var b = a[1:4]
+// missing low index implies 0
+var b = a[:3]
+// missing high index implies len(a)
+var b = a[3:]
+// append items to slice a
+a =  append(a,17,3)
+// concatenate slices a and b
+c := append(a,b...)
 
 // create a slice with make
 a = make([]byte, 5, 5)    // first arg length, second capacity

sheets/_python/loops

@@ -32,17 +32,17 @@ else:
 # Basic 'for' loop:
 for i in range(6):
     print(i) #prints 0, 1, 2, 3, 4, 5
-
+#
 for i in range(2, 6):
     print(i) #prints 2, 3, 4, 5
-
+#
 for i in range(3, 10, 2):
     print(i) #prints 3, 5, 7, 9
 
 # Iterating through collections:
 for i in [0, 1, 1, 2, 3, 5]:
     print(i) #prints 0, 1, 1, 2, 3, 5
-
+#
 for i in 'qwerty':
     print(i) #prints q, w, e, r, t, y