Fixup and test emp::Fraction #1129

Job	Run time
Test Tidy Enforcement on macOS	2m 27s
Measure Test Coverage	33m 25s
Enforce Tidyness	1m 5s
Web Tests	6m 43s
Tests (clang++, test-native-regular)	26m 57s
Tests (clang++, test-native-fulldebug)	26m 48s
Tests (clang++, test-native-opt)	48m 9s
Build Docker Image	9m 0s
Tests (clang++, test-examples)	9m 44s
Tests (clang++, test-demos)	2m 52s
Tests (g++, test-native-regular)	36m 36s
Tests (g++, test-native-fulldebug)	37m 17s
Tests (g++, test-native-opt)	51m 46s
Tests (g++, test-examples)	9m 12s
Tests (g++, test-demos)	2m 49s
Test Documentation Build	12m 23s
Deploy Documentation Coverage	0s
Deploy to DockerHub and ghcr.io	0s
	5h 17m 13s

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