Add test-pretty tests for number formatting

Also remove pretty.number tests from there,
a copy exists in test-pretty-number already.

tests/test-pretty.lua

@@ -84,35 +84,11 @@ t2 = {}
 t1[1],t1[2] = t2,t2
 asserteq( pretty.write(t1,""), [[{{},{}}]] )
 
-function testm(x,s)
-  asserteq(pretty.number(x,'M'),s)
-end
-
-testm(123,'123B')
-testm(1234,'1.2KiB')
-testm(10*1024,'10.0KiB')
-testm(1024*1024,'1.0MiB')
-
-function testn(x,s)
-  asserteq(pretty.number(x,'N',2),s)
-end
+-- Check number formatting
+asserteq(pretty.write({1/0, -1/0, 0/0, 1, 1/2}, ""), "{Inf,-Inf,NaN,1,0.5}")
 
-testn(123,'123')
-testn(1234,'1.23K')
-testn(10*1024,'10.24K')
-testn(1024*1024,'1.05M')
-testn(1024*1024*1024,'1.07B')
-
-function testc(x,s)
-  asserteq(pretty.number(x,'T'),s)
+if _VERSION == "Lua 5.3" then
+    asserteq(pretty.write({1.0}, ""), "{1.0}")
+else
+    asserteq(pretty.write({1.0}, ""), "{1}")
 end
-
-testc(123,'123')
-testc(1234,'1,234')
-testc(12345,'12,345')
-testc(123456,'123,456')
-testc(1234567,'1,234,567')
-testc(12345678,'12,345,678')
-
-asserteq(pretty.number(1e12,'N'),'1000.0B')
-