Minor corrections to some unit abbreviations (#1496)

**AreaMomentOfInertia:**
> Use superscript (cm², m³) instead of cm^2, m^3

**MolarEntropy:**
> Use · for products (N·m instead of Nm, N*m or N.m)

**SpecificEntropy:**
> Use · for products (N·m instead of Nm, N*m or N.m)

Using parentheses for mathematically correct display; using the correct
symbol for degrees Celsius

**SpecificFuelConsumption:**
It looks like some unusual multiplication sign was used

**WarpingMomentOfInertia:**
> Use superscript (cm², m³) instead of cm^2, m^3

---

For ^4 and ^6 UnitParser.NormalizeUnitString() will handle this
situation

---------

Co-authored-by: Alexey Yagelo <Alexey.Yagelo@medi.report>
Co-authored-by: Andreas Gullberg Larsen <andreas.larsen84@gmail.com>

Author: 3 people

Common/UnitDefinitions/AreaMomentOfInertia.json

@@ -17,7 +17,7 @@
       "Localization": [
         {
           "Culture": "en-US",
-          "Abbreviations": [ "m⁴", "m^4" ]
+          "Abbreviations": [ "m⁴" ]
         }
       ]
     },
@@ -32,7 +32,7 @@
       "Localization": [
         {
           "Culture": "en-US",
-          "Abbreviations": [ "dm⁴", "dm^4" ]
+          "Abbreviations": [ "dm⁴" ]
         }
       ]
     },
@@ -47,7 +47,7 @@
       "Localization": [
         {
           "Culture": "en-US",
-          "Abbreviations": [ "cm⁴", "cm^4" ]
+          "Abbreviations": [ "cm⁴" ]
         }
       ]
     },
@@ -62,7 +62,7 @@
       "Localization": [
         {
           "Culture": "en-US",
-          "Abbreviations": [ "mm⁴", "mm^4" ]
+          "Abbreviations": [ "mm⁴" ]
         }
       ]
     },
@@ -77,7 +77,7 @@
       "Localization": [
         {
           "Culture": "en-US",
-          "Abbreviations": [ "ft⁴", "ft^4" ]
+          "Abbreviations": [ "ft⁴" ]
         }
       ]
     },
@@ -92,7 +92,7 @@
       "Localization": [
         {
           "Culture": "en-US",
-          "Abbreviations": [ "in⁴", "in^4" ]
+          "Abbreviations": [ "in⁴" ]
         }
       ]
     }

Common/UnitDefinitions/Entropy.json

@@ -44,7 +44,7 @@
       "Localization": [
         {
           "Culture": "en-US",
-          "Abbreviations": [ "J/C" ]
+          "Abbreviations": [ "J/°C" ]
         }
       ]
     }

Common/UnitDefinitions/MolarEntropy.json

@@ -19,7 +19,7 @@
       "Localization": [
         {
           "Culture": "en-US",
-          "Abbreviations": [ "J/(mol*K)" ]
+          "Abbreviations": [ "J/(mol·K)" ]
         }
       ]
     }

Common/UnitDefinitions/SpecificEntropy.json

@@ -17,7 +17,7 @@
       "Localization": [
         {
           "Culture": "en-US",
-          "Abbreviations": [ "J/kg.K" ]
+          "Abbreviations": [ "J/kg·K" ]
         }
       ]
     },
@@ -30,7 +30,7 @@
       "Localization": [
         {
           "Culture": "en-US",
-          "Abbreviations": [ "J/kg.C" ]
+          "Abbreviations": [ "J/kg·°C" ]
         }
       ]
     },
@@ -43,7 +43,7 @@
       "Localization": [
         {
           "Culture": "en-US",
-          "Abbreviations": [ "cal/g.K" ]
+          "Abbreviations": [ "cal/g·K" ]
         }
       ]
     },

Common/UnitDefinitions/SpecificFuelConsumption.json

@@ -24,7 +24,7 @@
       "Localization": [
         {
           "Culture": "en-US",
-          "Abbreviations": [ "kg/(kgf�h)" ]
+          "Abbreviations": [ "kg/(kgf·h)" ]
         }
       ]
     },
@@ -37,8 +37,8 @@
       "Localization": [
         {
           "Culture": "en-US",
-          "Abbreviations": [ "g/(kN�s)" ],
-          "AbbreviationsForPrefixes": { "Kilo": [ "kg/(kN�s)" ] }
+          "Abbreviations": [ "g/(kN·s)" ],
+          "AbbreviationsForPrefixes": { "Kilo": [ "kg/(kN·s)" ] }
         }
       ]
     }

Common/UnitDefinitions/WarpingMomentOfInertia.json

@@ -17,7 +17,7 @@
       "Localization": [
         {
           "Culture": "en-US",
-          "Abbreviations": [ "m⁶", "m^6" ]
+          "Abbreviations": [ "m⁶" ]
         }
       ]
     },
@@ -32,7 +32,7 @@
       "Localization": [
         {
           "Culture": "en-US",
-          "Abbreviations": [ "dm⁶", "dm^6" ]
+          "Abbreviations": [ "dm⁶" ]
         }
       ]
     },
@@ -47,7 +47,7 @@
       "Localization": [
         {
           "Culture": "en-US",
-          "Abbreviations": [ "cm⁶", "cm^6" ]
+          "Abbreviations": [ "cm⁶" ]
         }
       ]
     },
@@ -62,7 +62,7 @@
       "Localization": [
         {
           "Culture": "en-US",
-          "Abbreviations": [ "mm⁶", "mm^6" ]
+          "Abbreviations": [ "mm⁶" ]
         }
       ]
     },
@@ -77,7 +77,7 @@
       "Localization": [
         {
           "Culture": "en-US",
-          "Abbreviations": [ "ft⁶", "ft^6" ]
+          "Abbreviations": [ "ft⁶"]
         }
       ]
     },
@@ -92,7 +92,7 @@
       "Localization": [
         {
           "Culture": "en-US",
-          "Abbreviations": [ "in⁶", "in^6" ]
+          "Abbreviations": [ "in⁶" ]
         }
       ]
     }