Fix missing unittests in docs (#8603)

* Fix missing staticArray unittest in docs

Found using https://github.com/dlang/dmd/pull/14527.

* Fix missing FloatRep and DoubleRep unittests in docs

* 2 JSONValue op overloads

* std.random

* detabber

* remove

* std.digest.murmurhash

std/algorithm/mutation.d

@@ -1943,6 +1943,7 @@ if (Offset.length >= 1 && allSatisfy!(isValidIntegralTuple, Offset))
     return removeImpl!s(range, offset);
 }
 
+/// ditto
 deprecated("Use of non-integral tuples is deprecated. Use remove(tuple(start, end).")
 Range remove
 (SwapStrategy s = SwapStrategy.stable, Range, Offset ...)

std/array.d

@@ -4676,6 +4676,7 @@ nothrow pure @safe @nogc unittest
     assert(a == [0, 1]);
 }
 
+/// ditto
 pragma(inline, true) U[n] staticArray(U, T, size_t n)(auto ref T[n] a)
 if (!is(T == U) && is(T : U))
 {

std/bitmanip.d

@@ -784,48 +784,6 @@ if (is(T == class))
     static assert(!__traits(compiles, bar(s)));
 }
 
-/**
-   Allows manipulating the fraction, exponent, and sign parts of a
-   `float` separately. The definition is:
-
-----
-struct FloatRep
-{
-    union
-    {
-        float value;
-        mixin(bitfields!(
-                  uint,  "fraction", 23,
-                  ubyte, "exponent",  8,
-                  bool,  "sign",      1));
-    }
-    enum uint bias = 127, fractionBits = 23, exponentBits = 8, signBits = 1;
-}
-----
-*/
-alias FloatRep = FloatingPointRepresentation!float;
-
-/**
-   Allows manipulating the fraction, exponent, and sign parts of a
-   `double` separately. The definition is:
-
-----
-struct DoubleRep
-{
-    union
-    {
-        double value;
-        mixin(bitfields!(
-                  ulong,   "fraction", 52,
-                  ushort,  "exponent", 11,
-                  bool,    "sign",      1));
-    }
-    enum uint bias = 1023, signBits = 1, fractionBits = 52, exponentBits = 11;
-}
-----
-*/
-alias DoubleRep = FloatingPointRepresentation!double;
-
 private struct FloatingPointRepresentation(T)
 {
     static if (is(T == float))
@@ -851,6 +809,27 @@ private struct FloatingPointRepresentation(T)
     }
 }
 
+/**
+   Allows manipulating the fraction, exponent, and sign parts of a
+   `float` separately. The definition is:
+
+----
+struct FloatRep
+{
+    union
+    {
+        float value;
+        mixin(bitfields!(
+                  uint,  "fraction", 23,
+                  ubyte, "exponent",  8,
+                  bool,  "sign",      1));
+    }
+    enum uint bias = 127, fractionBits = 23, exponentBits = 8, signBits = 1;
+}
+----
+*/
+alias FloatRep = FloatingPointRepresentation!float;
+
 ///
 @safe unittest
 {
@@ -899,6 +878,27 @@ private struct FloatingPointRepresentation(T)
     assert(rep.sign);
 }
 
+/**
+   Allows manipulating the fraction, exponent, and sign parts of a
+   `double` separately. The definition is:
+
+----
+struct DoubleRep
+{
+    union
+    {
+        double value;
+        mixin(bitfields!(
+                  ulong,   "fraction", 52,
+                  ushort,  "exponent", 11,
+                  bool,    "sign",      1));
+    }
+    enum uint bias = 1023, signBits = 1, fractionBits = 52, exponentBits = 11;
+}
+----
+*/
+alias DoubleRep = FloatingPointRepresentation!double;
+
 ///
 @safe unittest
 {

std/digest/murmurhash.d

@@ -38,11 +38,6 @@ $(BR) $(LINK2 https://en.wikipedia.org/wiki/MurmurHash, Wikipedia)
  */
 module std.digest.murmurhash;
 
-version (X86)
-    version = HaveUnalignedLoads;
-else version (X86_64)
-    version = HaveUnalignedLoads;
-
 ///
 @safe unittest
 {
@@ -97,6 +92,11 @@ else version (X86_64)
     assert(hashed == [188, 165, 108, 2]);
 }
 
+version (X86)
+    version = HaveUnalignedLoads;
+else version (X86_64)
+    version = HaveUnalignedLoads;
+
 public import std.digest;
 
 @safe:

std/json.d

@@ -678,6 +678,7 @@ struct JSONValue
             assert( j["language"].str == "Perl" );
     }
 
+    /// ditto
     void opIndexAssign(T)(T arg, size_t i)
     {
         auto a = this.arrayNoRef;
@@ -754,11 +755,13 @@ struct JSONValue
         assert(j["author"].str == "Walter");
     }
 
+    ///
     bool opEquals(const JSONValue rhs) const @nogc nothrow pure @safe
     {
         return opEquals(rhs);
     }
 
+    /// ditto
     bool opEquals(ref const JSONValue rhs) const @nogc nothrow pure @trusted
     {
         // Default doesn't work well since store is a union.  Compare only

std/random.d

@@ -107,18 +107,6 @@ module std.random;
 import std.range.primitives;
 import std.traits;
 
-version (OSX)
-    version = Darwin;
-else version (iOS)
-    version = Darwin;
-else version (TVOS)
-    version = Darwin;
-else version (WatchOS)
-    version = Darwin;
-
-version (D_InlineAsm_X86) version = InlineAsm_X86_Any;
-version (D_InlineAsm_X86_64) version = InlineAsm_X86_Any;
-
 ///
 @safe unittest
 {
@@ -178,6 +166,18 @@ version (D_InlineAsm_X86_64) version = InlineAsm_X86_Any;
         assert([0, 1, 2, 4, 5].randomShuffle(rnd2).equal([4, 2, 5, 0, 1]));
 }
 
+version (OSX)
+    version = Darwin;
+else version (iOS)
+    version = Darwin;
+else version (TVOS)
+    version = Darwin;
+else version (WatchOS)
+    version = Darwin;
+
+version (D_InlineAsm_X86) version = InlineAsm_X86_Any;
+version (D_InlineAsm_X86_64) version = InlineAsm_X86_Any;
+
 version (StdUnittest)
 {
     static import std.meta;

std/string.d

@@ -4845,6 +4845,7 @@ if (isForwardRange!Range && isSomeChar!(ElementEncodingType!Range) &&
     assert(detabber(" \n\tx", 9).array == " \n         x");
 }
 
+/// ditto
 auto detabber(Range)(auto ref Range r, size_t tabSize = 8)
 if (isConvertibleToString!Range)
 {