feat(number): trim extra trailing zeroes (#1768)

src/printer.js

@@ -4302,6 +4302,8 @@ function printNumber(rawNumber) {
       .replace(/^([\d.]+)e[+-]?0+$/, "$1")
       // Make sure numbers always start with a digit.
       .replace(/^\./, "0.")
+      // Remove extraneous trailing decimal zeroes.
+      .replace(/(\.\d+?)0+(?=e|$)/, "$1")
       // Remove trailing dot.
       .replace(/\.(?=e|$)/, "")
   );

tests/literal/__snapshots__/jsfmt.spec.js.snap

@@ -65,6 +65,30 @@ function test5(): string {
 0.5e+00
 0.5e-0
 0.5e-00
+
+1
+1.00500
+1.0
+1.5
+1.50
+0
+0.00500
+0.0
+0.0000
+.0
+500600.001230045000
+1.00500e60
+1.0e60
+0.00500e60
+0.0e60
+0.0000e60
+.0e60
+0.e60
+0e60
+500600.001230045000e60
+10
+9700
+10e100
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 // parentheses around numeric literal should be preserved
 function test5(): string {
@@ -131,4 +155,28 @@ function test5(): string {
 0.5;
 0.5;
 
+1;
+1.005;
+1.0;
+1.5;
+1.5;
+0;
+0.005;
+0.0;
+0.0;
+0.0;
+500600.001230045;
+1.005e60;
+1.0e60;
+0.005e60;
+0.0e60;
+0.0e60;
+0.0e60;
+0e60;
+0e60;
+500600.001230045e60;
+10;
+9700;
+10e100;
+
 `;

tests/literal/number.js

@@ -62,3 +62,27 @@ function test5(): string {
 0.5e+00
 0.5e-0
 0.5e-00
+
+1
+1.00500
+1.0
+1.5
+1.50
+0
+0.00500
+0.0
+0.0000
+.0
+500600.001230045000
+1.00500e60
+1.0e60
+0.00500e60
+0.0e60
+0.0000e60
+.0e60
+0.e60
+0e60
+500600.001230045000e60
+10
+9700
+10e100